Needle valve mechanism



Feb. 19, 1935. o. c. RlTZ WOLLER NEEDLE VALVE MECHANISM Filed June 26, 1931 F .i 2 J. m l \T. r 7 JZ/K/A 2 E n .U F I 0 mn% m. .ux

Patented Feb. 19, 1935 UNrr-Eo STATES A v l 1,991,875 1 p NEEDLE VALVE. MECHANISM :Dliver (inkitzwwollenflhicamglll, Application June 26, 1931,.SerialNo. 547,158 sla-iemme. (01.25144) My invention relates to needle valve :mechaand is particularly designed ,for use in connection with an adjustablespray jetinia wellknown typeofcarburetor. Itisoneof theobjects of my inventionto providean-improved formand arrangement of parts whereby the-valve mechanism shall be enabled .to stand .up through long periods. of use andremain-effectivein. every wayregardless of frequent and unnecessary-or unskilled adjustments. 7

It is oneof .the objects ofmyinventiontoproduce an arrangement of this type in which the required-amount of play isprovided for enabling a user ,to move the ,needle adjusting means through the completerangeof its actioninthe directionfdrcutting down the l. flow ofgasoline without danger of injuring :the needle valve, either in the .way of bending. the needle or.in. the way of spreading themouth of the nozzle .into which the needle is pressed. Toethisqend it is one of the objectszof my inventiontoprovidean improvedarrangement by whichtheneedl'e is held yieldinglyindts operativepos'ition through the medium of a. spring .or otheryielding. means which normally holds .the. needle in the desired operative positionforanyproper adjustment .of the partsbut whiehiis adapted totyield so as to prevent damage tothe parts .when an improper adjustment is made suchas would otherwisepress .theneedle forwardltoo far and too ..forcibly..into

engagement .withits cooperating parts. 7

It. is. another. object of. my. invention to a provide an improved arrangement of packing means in connection with an adjustable mechanism of this type whereby leakage of gasoline at. the valve may beprevented. I

It is another object of myinventionto'improve devices. of this typeinsundry details hereinafter pointed out. The preferredmeans by .whichfI have accomplished my several Iobj cots. are illustrated in the drawing and are hereinafter .speoiflcally described. That which Ibelieve to be'new and desire .to. cover by Letters Patent. is '.set.forth in the.claims..

In thedrawing,-- I

Fig.1 isacentral vertical section through, a needle valve mechanismembodyingmy. improved construction and arrang-ement;,..and

Fig- 2 is a view similar tothelower portion of Fig. 1 but showing an adjusted position of.certain of the parts.

Referring tothe drawing, 10 indicates ablock of metal, being in thearrangement shown a thickened part of the wall ofa carburetor. The

block .10 is bored out atits bottom facetoprovide :a-chamber .11 therein adapted to :receive gasoline or other :liquid -.-fuel through --a port '12 from ;any suitable I source. -At one side 40f .the chamber 11, asleeve 13ris provided opening atiits innerend into the chamber,-such sleevebeing 5 mountedin position by -means of an enlarged portion 14 which-is connected :byrmeans of-screw' threads with the wall of an opening from .the chamber '11, argasket 15: of anysuitable; type :bein preferably providedfor forming a tight-joint 10 between. .theparts. The. outerend portion of: the sleeve :13 is .tapered inwardly so as 1 to provide .=a tapered seat for a needle 16 which extends into the sleeve ,.1.3 rso-asgto close the opening .at the end .of :the sleeve. 7 Y 7 ,The rearend of .the needle 16,is .mounted-in a slidelbearing at the iforwardend portion.of.-a headmember 18, therearrend of theneedle 16 havingan enlarged :portion .17 adapted to seat against -.the.shoulder,at the inner end of .said .80 bearing-portion, therear endportionof the head 18' having acentral opening therethrough i. of larger size than that through said bearing-portion'. Acoiled spring..19 is-mounted in .thebore. of .the head 18 in rear ofthe needle 16,.the..for- :86 ward end of the spring .bearingagainst the .en-' larged end portion of the. needle,.andl the rear end of .the .spring bearing against .a knurled. closure member 20 having. a pressed fit .by means of .a lug, 21.intheboreofthehead I8, agasketJ22jbeingemployed uponthelugJZl opposite theend of the head 18. Thearrangementis such that thehead .l8ymay' be readily manipulated through the'medium .ofitheiknurle'd member 20, and the spring '19 isnormallycompressed so as .toihold 35 .the needle 16 in its jfullyprojected position .as shown in Fi -Elisprin 19.is adapt d,ihow- 7 ever, to .yieldbackwardly so'asito permit movejust'ably mounted in its operative position as shown ,inrEigulby meansof a bush g Ornipple .23whichis lsecured'by means of screw threads in the .outer end .of the opening providing the .50 chamber-.11, .a gasket .124! of any approved type be n preferably Provided between .the .block 10 .andan annular. rib.25 on the outer .ffaceof .the nipple .123 so as .to provide. a tight jointlbetween the The .head 1.8 in the construction shown is adjustably mounted within the nipple 23 by means of screw threads, the arrangement being such that when the head 18 is rotated through the medium of the knurled member 20 such head 18 is moved forwardly toward the sleeve 13 or backwardly away from such sleeve as may be desired.

For providing a tight joint between the head 18 and the nipple 23, I have provided packing means in the form of a plurality of gaskets 26, preferably of leather, such gaskets being mounted about the head 18 so as to engage the end of the nipple 23. A comparatively heavy spring 2'? is mounted about the head 18 in rear of the packing washers 26, bearing at its forward end against said washers, but with a metal washer'28 interposed, the spring 27 bearing at its rear end against the end wall of a cap 29 which surrounds the spring and washers, the forward end of the cap 29 having a tight pressed fit upon the rear end of the nipple 23. The arrangement and proportions of the parts are such that under normal conditions as shown in said Fig. 1 the spring 27 presses the packing washers 26 firmly against the sides of the head 18'and against the end of the nipple 23 so as to provide a tight joint between such parts, such joint being adapted to remain effective at all times upon adjustment of the head 18 in either direction with respect to the nipple 23. e The spring 27 is also of such strength as to push, the packing-washers forward into operative closure position when the washers shrink or otherwise tend to loosen with respect to the parts.

With the parts in the condition as shown in Fig. 1, upon the rotation of the head 18 through the medium of the knurled member 20 the head 18 may be moved forwardly toward the sleeve 13, serving to adjust the forward end of the needle 16with respect to the opening at the end of the sleeve 13. The arrangement is such that the needlelB moves either forwardly or backwardly with the head 18 for effecting the desired adjustment of the effective size of the opening at the end'of the sleeve. When, however, the end of the needle 16 is moved to the limit of its normal forward motion with respect to the sleeve 13, there is no danger that continued adjustment of the head 18 in the direction for producing forward movement of the. needle shall result in undue pressure of the needle against the seat at the end of the sleeve 13, since under such circumstances the spring 19 yields backwardlywith respect to the head'18 so as to permit the needle to remain stationary. The arrangement is such that the head 18 might be projected forwardly a considerabledistance beyond the forward end of the nipple 23 without having any effect'upon the needle 16 other than to increase slightly the pressure of the spring 19 thereon. 1

In Fig. 2 I have shown the parts in position similar to that illustrated in Fig.' 1' except that in Fig. 2 the bearing portion at the forward end of the head 18,is standing in adjusted position with respect to the enlarged portion 17 of the pin 16, the spring 19 having yielded backwardly to the' necessary extent for permitting such change in position.

By the use of my improved construction, I am enabled to adjust the needle valve member 16 to the desired position with respect to the sleeve 13 f orcontrolling the effective size of the opening at the end of the sleeve so as to regulate with a high degree of nicety the amount of gasoline permitted'to escape fromthe sleeve under the influence of the suction of the engine with which the carburetor is designed to act. Such adjustment can be effected without danger of injury to any of the parts. The arrangement is such that there is no danger of leakage of gasoline at any time after the initial proper adjustment of the mechanism.

While I prefer to employ the form of device as shown in my drawing and as above described, it is to be understood that my invention is not limited thereto except so far as the claims may be so limited by the prior art.

I claim:- I Y .1. In a needle valve mechanism, the combination of a nipple adapted for mounting in the wall of a carburetor and having an opening therethrough', al -comparatively long slender needle valve member having its rear end portion located within the opening in said nipple and comprising a pointed forward end portion extendingbeyond the nipplefor partially closing the opening at the inner end of a spray sleeve of thecarburetor, yielding means engaging said--needle valve member for pressing it forwardly in said nipple, and means carried by said nipple for pressing the spring forwardly and comprising a part adjustable forwardly withirespect to the nipple for limiting the forward movement-of the needle valvemember with respect to said nipple.

2. A needle valve mechanism, comprising in combination a chamber having an outlet opening defined by an expansible wall portionconstituting a seat forthe valve through which'open ing gasoline is adapted to escape'from the chamher, a needle valve, and adjustable meanscomprising a' yielding member adapted normally to project the forward end portion of said needle valve, longitudinally through said opening and adapted to permit said yielding member to give backwardly uponjexcessive movement of the adjustable means.

I 3.;A needle valve mechanism comprising in combination a chamber, a sleeve leading from one side of said chamber and having a restricted tapered opening at its outer end,'a needle valve extending through the sleeve and having a tapered outer end portion adapted to close the outer end of said sleeve, and adjustable means for moving said needle longitudinally of said sleeve forregulating the effective size of the opening in said sleeve about the needle and comprising yielding means adapted to give for permitting the needle to remain stationary upon continued adjustment after the needle is brought into operative closing engagement with the end'portion 01' said sleeve.

4. A needle valve mechanism comprisingin combination a chamber, a sleeve leading from one side of said chamber and having a restricted ta pered opening at itsouter end, a nipple secured by screw threads in the opposite side portion of 'saidchambe'r having an opening therethrough in alignment with said sleeve, a needle .valve in the opening in said nipple and extending into said sleeve, and adjustable means for moving said needle lengthwise of said sleeve and comprising a part adapted to yield backwardly for permitting the needle to remain stationary upon continued adjustment after'said needlev is brought into operative closing engagement with the end portion of said sleeve. p 5. A needle valve mechanism comprising in combination a chamber, a sleeve leading from one side of said chamber and having a restricted tapered opening at its outer end, a nipple secured by screw threads in theopposite side portion of said chamber having an opening therethrough in alignment with said sleeve, a head mounted by means of screw threads in the opening in said nipple, a needle valve mounted in said head and movable longitudinally with respect thereto, and 1 spring means serving normally to hold said needle moved to the limit of its motion with respect to said head but adapted to yield for permitting the needle to remain stationary upon further adjustment after said needle is brought into operative closing engagement with the end portion of said sleeve. I

6. A needle valve mechanism comprising in combination a nipple having an opening therethrough, a needle valve in said opening, means comprising a spring for holding said needle valve in operative position in said opening, packing means in operative position between said nipple and said needle holding means, and a spring for holding said packing means yieldingly in operative position. i V

:7. A needle valve mechanism comprising in combination a nipple having an opening therethrough, a head adjustably mounted in said opening, a needle valve mounted in said head and movable longitudinally with respect thereto, spring means for pressing said needle valve forward with respect to said head but adapted to yield backwardly, packing means surrounding said head opposite the end of said nipple, and spring means for holding said packing means yieldingly in operative engagement with said head and said nipple.

8. A needle valve mechanism comprising in combination a sleeve having an opening at one end of substantially smaller size than that of the sleeve, a needle valve mounted in said sleeve and having a tapered portion adapted by adjustment longitudinally of the sleeve to vary the effective size of the opening about the needle, and means for pressing said needle towards and partially through said opening and comprising a part adapted to yield backwardly with respect to the remainder of the pressure means when the needle has reached the normal limit of its motion with respect to the sleeve.

9. A needle valve mechanism comprising in combination a sleeve having an opening at one end of substantially smaller size than that of the sleeve, a needle valve mounted in said sleeve and having a tapered portion adapted by adjustment longitudinally of the sleeve to vary the size of the opening about the needle, a member adjustable toward and from said sleeve adapted by engagement with said needle valve to limit its movement along the sleeve into operative closure position therein, and yielding means tending to move said needle valve in the direction for closing said openingwhen said adjustable member is moved toward the sleeve but adapted to yield backwardly when the needle valve has reached its operative closure position in said sleeve.

10. A needle valve mechanism comprising in combination a chamber, a sleeve leading from one side of said chamber andhavinga restricted tapered opening at its outer end, a head adjustably secured in the opposite side portion of said chamber and having an opening therethrough in alignment with said sleeve, a needle valve in said opening, and spring means for pressing said needle forwardly with respect to said head but adapted to yield backwardly for permitting the needle to remain stationary upon. continued adjustment of the head after the needle has been brought into operative closing engagement with the end portion of said sleeve.

11. A unit type of needle valve mechanism for use in the spray jet of a carburetor, comprising in combination a nipple member having an opening therethrough and provided with screw threads adapted by engagement with the threads of the socket in the wall of the carburetor through which gasoline is introduced into the carburetor to support the nipple in fixed position on the carburetor, a needle valve in said opening and projecting forwardly therefrom and having a sharp end portion for operative engagement with the tapered opening at the end of the spray sleeve of the carburetor, and adjustable means including a yielding member adapted normally to project said needle valve forwardly longitudinally ofthe opening in said nipple and adapted when said needle valve reaches the limit of its normal forward movement to permit said yielding member to yield backwardly. V

12. A unit type of needle valve mechanism for use in the spray jet of a carburetor, comprising in combination a nipple member having an opening therethrough and provided with screw threads adapted by engagement with the threads of the socket in the wall of the carburetor through which gasoline is introduced into the carburtor to support the nipple in fixed position on the carburetor, a head adjustably mounted in the opening in said nipple and having in turn an elongated opening therein open at its forward end, a needle valve member mounted in said opening in the head and extending forwardly therefrom beyond the nipple member and having a sharp end portion for operative engagement with the tapered opening in the end of the spray sleeve of the carburetor, means for holding said needle valve member from escaping forwardly from said opening in the head, and spring means adapted normally to hold said needle valve member at the limit of its movement forwardly in said head but adapted to yield backwardly when the needle valve member is by the adjustment of said head brought to the limit of its normal forward movement with respect tosaid spray sleeve.

13. A unit type of needle valve mechanism for use in the spray jet of a carburetor, comprising in combination a nipple member having an opening therethrough and provided with screw threads adapted by engagement with the threads of the socket in the wall of the carburetor through which gasoline is introduced into the carburetor to support the nipple in fixed position on the carburetor, a comparatively long slender needle valve member mounted at its rear end portion in the opening in said nipple and extending some little distance forwardly therefrom for partially closing the tapered discharge opening at the end of the spray sleeve leading inwardly from said socket, and adjustable means including a yielding member adapted normally by pressure on said needle valve member to move said member forwardly in said opening in said nipple and I adapted when said needle valve member reaches the normal limit of its forward movement through said tapered opening in the sleeve to permit said yielding member to yield backwardly so as to avoid enlargement of .the opening in the sleeve by said needle valve member.

OLIVER C. RITZ WOLLER. 

